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Name the 300 largest Agglomerations in the world (according to citypop.de), where naming any agglo will fill in all agglos within 500km. If I missed a city name to include in an agglo let me know.
48 Agglos are not within 500km of another, these are marked with a "*". As geography Sporclers know, agglo rankings and populations vary greatly depending on the source, so I chose one particular source for all the data instead of combining sources.